Right Angle Prisms


Right Angle – Deviation, Displacement

Right angle prisms are optical elements having at least three polished faces inclined relative to each other at 45-90-45 degrees. Right Angle Prism can be used to bend a beam by 90° or 180°, depending on which face is entrance face. Paralight Optics can provide standard right angle prisms from 0.5mm to 50.8mm size. Special sizes can also be offered upon request. They can be used as total internal reflectors, hypotenuse face reflectors, retroreflectors and 90° beam benders.

Material Properties


Deviate the ray path by 90° or 180°.
Used in combination for image/beam displacement.


Endoscopy, microscopy, laser alignment, medical instrumentation.

Common Specifications


Transmission Regions & Applications

Parameters Ranges & Tolerances
Substrate Material N-BK7 (CDGM H-K9L)
Type Right-Angle Prism
Dimension Tolerance +/-0.20 mm
Angle Tolerance +/-3 arcmin
Surface Quality (scratch-dig) 60-40
Pyramidal Error < 3 arcmin
Clear Aperture > 90%
Surface Flatness λ/4 @ 632.8 nm per 25mm range
AR Coating Entrance and exit surfaces (MgF2): λ/4 @ 550 nm
Hypotenuse Protected aluminum

If your project demands any prism we are listing or another type such as littrow prisms, beamsplitter penta Prisms, half-penta prisms, porro prisms, roof prisms, schmidt prisms, rhomhoid prisms, brewster prisms, anamorphic prism pairs, pallin broca prisms, light pipe homogenizing rods, tapered light pipe homogenizing rods, or a more complex prism, we welcome the challenge of solving your design needs.